That’s one of the dangers Meghan Wren pointed out at her press conference on Fortescue Beach Thursday in preparation for her 13.1-mile Delaware Bay Swim 2013 attempt on Saturday, Aug. 3.

But stinging jellyfish as big as dinner plates is the more pressing problem.

This will be a first.

“It’s never been done before,’’ she said. “A couple of people have gone from Cape May to Lewes, so kudos to them for that awesome journey.

“I want to bring attention to all aspects of the Delaware Bay, especially at this point after Sandy where people were already struggling to make ends meet and didn’t need this.

“I want it to be a celebration on the beach that day.’’

Phil Tomlinson is already organizing a fishing contest for the beach.

“I anticipate an 8- to 10-hour swim and I have a navigation team that has been plotting the course," Wren said. “I don’t know exactly where I’ll come in. I have been in touch with the Coast Guard and I have a number to call to see what the shipping traffic is doing. But, if I’m going across and a tanker is coming, I’ll have to wait.’’